Comparison of Canon EF 8-15mm ƒ/4L USM Fisheye and Sigma 8mm f/4 EX DG Circular Fisheye [S]ave
| Attribute |  Canon EF 8-15mm ƒ/4L USM Fisheye × |  Sigma 8mm f/4 EX DG Circular Fisheye × |
|---|---|---|
| Aperture (f) | 4.00 - 22.00 | 4.00 - 32.00 |
| Magnification Ratio (x) | 0.39 | 0.07 |
| Notes | Included Accessories: lens hood, case | Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax; Included Accessories: Gelatin Filter Holder, Fitted, Padded Case |
| Focus Details | Inner focusing; Ultra-sonic Motor (USM) with AF/MF switch | - |
| Closest Focus (m) | 0.16 | 0.2 |
| Lens Construction | 14 elements in 11 groups, including UD and aspherical elements | 10 Elements in 6 Groups |
| Length (mm) | 83 | 63 |
| Focal Length (mm) | 8.00 - 15.00 | 8.00 |
| APS Equivalent | 13 - 24mm | 1.5x: 12mm; 1.6x: 12.8mm |
| Brand | Canon | Sigma |
| Image Circle | 35mm | 35mm |
| Name | Canon EF 8-15mm ƒ/4L USM Fisheye | Sigma 8mm f/4 EX DG Circular Fisheye |
| Weight (g) | 540 | 320 |
| Type | Wide Zoom Fisheye | Fisheye Prime |
| Diagonal Angle of View (degree) | 175.50 - 180.00 | 180.00 |
| Diaphragm Blades | 7 | 5 |
| Zoom System | Rotary | - |
| Diameter (mm) | 78.5 | 73.5 |
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